* {
  margin: 0;
  padding: 0;
}
body {
  width: 100%;
  height: 100%;
  text-align: center;
}
.container {
  display: inline-block;
  border: 1px solid;
  border-radius: 10px;
  box-shadow: -5px 5px 5px #cccccc, 5px 5px 5px #cccccc;
}
.show {
  width: 100%;
  height: auto;
  display: block;
}
.show-child {
  margin: 10px;
}
